Lexus ISF vs Chevy SS Autocross

Comparison of me in my Lexus and a Chevy SS a friend let me drive.
Lexus has 275 Continental Extreme Contact Sport tires.
-2.5 front camber
-2.2 rear camber
1/32 toe in front and rear.
Chevy SS has 285 Goodyear Eagle Super Car 3.
SS has cam and tune.
It ended up being very close. The Lexus handled better. The SS had more power,. I think the Lexus would have been faster if it had a 200tw tire instead of the ECS.